A portion of Granicus Valles. This channel system is located west of Elysium Mons and likely was created by both lava and water flow related to the Elysium Mons volcanic complex. Full story here. Image credit: Image Credit: NASA/JPL/ASUFull Page

Professor McKinnon says, “Seeing dunes on Pluto – if that is what they are – would be completely wild, because Pluto’s atmosphere today is so thin... Either Pluto had a thicker atmosphere in the past, or some process we haven’t figured out is at work. It’s a head-scratcher." Image credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research InstituteFull Page

September 9, 2015: Two Moroccan boys hope the rock they found is a meteorite...

Wikipedia: "The canyon is believed to have formed when a diabase sill dating from a billion years earlier was split open, either by the weight of advancing glaciers or the large volumes of water released during their retreat. Erosion by wind and rain continued the formation of the canyon." Although not visible in the photo. Lake Superior is just above the horizon 20 km away. Full Page

August 5, 2015: An inspirational sign at a meeting of planetary scientists